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openwrt-owl/target/linux/omap24xx/patches-2.6.37/510-retu-tahvo-user-debuggi...

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---
drivers/cbus/Kconfig | 8 +++
drivers/cbus/retu-user.c | 117 +++++++++++++++++++++++++++++++++++++++++++++-
drivers/cbus/tahvo-user.c | 75 +++++++++++++++++++++++++++++
3 files changed, 198 insertions(+), 2 deletions(-)
Index: linux-2.6.37/drivers/cbus/Kconfig
===================================================================
--- linux-2.6.37.orig/drivers/cbus/Kconfig 2011-02-05 20:01:30.636705379 +0100
+++ linux-2.6.37/drivers/cbus/Kconfig 2011-02-05 20:56:11.593025426 +0100
@@ -28,6 +28,10 @@
If you want support for Tahvo's user space read/write etc. functions,
you should say Y here.
+config CBUS_TAHVO_USER_DEBUG
+ depends on CBUS_TAHVO_USER
+ bool "Enable Tahvo user space interface debugging"
+
config CBUS_TAHVO_USB
depends on CBUS_TAHVO && USB
tristate "Support for Tahvo USB transceiver"
@@ -56,6 +60,10 @@
If you want support for Retu's user space read/write etc. functions,
you should say Y here.
+config CBUS_RETU_USER_DEBUG
+ depends on CBUS_RETU_USER
+ bool "Enable Retu user space interface debugging"
+
config CBUS_RETU_POWERBUTTON
depends on CBUS_RETU
bool "Support for Retu power button"
Index: linux-2.6.37/drivers/cbus/retu-user.c
===================================================================
--- linux-2.6.37.orig/drivers/cbus/retu-user.c 2011-02-05 20:01:30.637705440 +0100
+++ linux-2.6.37/drivers/cbus/retu-user.c 2011-02-05 20:56:42.584938988 +0100
@@ -46,6 +46,12 @@
#define PFX "retu-user: "
+#ifdef CONFIG_CBUS_RETU_USER_DEBUG
+# define dprintk(fmt, x...) printk(KERN_DEBUG PFX fmt, x)
+#else
+# define dprintk(fmt, x...) do { } while (0)
+#endif
+
/* Bitmap for marking the interrupt sources as having the handlers */
static u32 retu_irq_bits;
@@ -105,6 +111,93 @@
3
};
+#ifdef CONFIG_CBUS_RETU_USER_DEBUG
+static const char * reg_access_text(unsigned int reg)
+{
+ if (WARN_ON(reg >= ARRAY_SIZE(retu_access_bits)))
+ return "X";
+ switch (retu_access_bits[reg]) {
+ case READ_ONLY:
+ return "R";
+ case WRITE_ONLY:
+ return "W";
+ case READ_WRITE:
+ return "RW";
+ case TOGGLE:
+ return "T";
+ }
+ return "X";
+}
+
+static const char * reg_name(unsigned int reg)
+{
+ static const char *names[] = {
+ [RETU_REG_ASICR] = "ASIC ID & revision",
+ [RETU_REG_IDR] = "Interrupt ID",
+ [RETU_REG_IMR] = "Interrupt mask",
+ [RETU_REG_RTCDSR] = "RTC seconds register",
+ [RETU_REG_RTCHMR] = "RTC hours and minutes register",
+ [RETU_REG_RTCHMAR] = "hours and minutes alarm and time set register",
+ [RETU_REG_RTCCALR] = "RTC calibration register",
+ [RETU_REG_ADCR] = "ADC result",
+ [RETU_REG_ADCSCR] = "ADC sample ctrl",
+ [RETU_REG_CC1] = "Common control register 1",
+ [RETU_REG_CC2] = "Common control register 2",
+ [RETU_REG_CTRL_CLR] = "Regulator clear register",
+ [RETU_REG_CTRL_SET] = "Regulator set register",
+ [RETU_REG_STATUS] = "Status register",
+ [RETU_REG_WATCHDOG] = "Watchdog register",
+ [RETU_REG_AUDTXR] = "Audio Codec Tx register",
+ };
+ const char *name;
+
+ if (reg >= ARRAY_SIZE(names))
+ return "";
+ name = names[reg];
+ if (!name)
+ return "";
+ return name;
+}
+
+static const char * adc_chan_name(unsigned int chan)
+{
+ static const char *names[] = {
+ [0x05] = "Headset hook detect",
+ };
+ const char *name;
+
+ if (chan >= ARRAY_SIZE(names))
+ return "";
+ name = names[chan];
+ if (!name)
+ return "";
+ return name;
+}
+
+static const char * retu_irq_name(unsigned int id)
+{
+ static const char *names[] = {
+ [RETU_INT_PWR] = "Power",
+ [RETU_INT_CHAR] = "Char",
+ [RETU_INT_RTCS] = "RTCS",
+ [RETU_INT_RTCM] = "RTCM",
+ [RETU_INT_RTCD] = "RTCD",
+ [RETU_INT_RTCA] = "RTCA",
+ [RETU_INT_HOOK] = "Hook",
+ [RETU_INT_HEAD] = "Head",
+ [RETU_INT_ADCS] = "ADC timer",
+ };
+ const char *name;
+
+ if (id >= ARRAY_SIZE(names))
+ return "";
+ name = names[id];
+ if (!name)
+ return "";
+ return name;
+}
+#endif
+
/*
* The handler for all RETU interrupts.
*
@@ -157,6 +250,8 @@
/* Mark that this interrupt has a handler */
retu_irq_bits |= 1 << id;
+ dprintk("Subscribed to IRQ %d (%s)\n", id, retu_irq_name(id));
+
return 0;
}
@@ -216,6 +311,10 @@
/* Generate new value */
tmp = (tmp & ~MASK(field)) | (value & MASK(field));
+
+ dprintk("{WRITE %s} 0x%02X(%s) <= msk 0x%04X, val 0x%04X ==> res 0x%04X\n",
+ reg_name(reg), reg, reg_access_text(reg), MASK(field), value, tmp);
+
/* Write data to RETU */
retu_write_reg(reg, tmp);
spin_unlock_irqrestore(&retu_lock, flags);
@@ -244,6 +343,9 @@
/* Read the register */
value = retu_read_reg(reg) & mask;
+ dprintk("{READ %s} 0x%02X(%s) <= msk 0x%04X ==> res 0x%04X\n",
+ reg_name(reg), reg, reg_access_text(reg), mask, value);
+
/* Right justify value */
while (!(mask & 1)) {
value = value >> 1;
@@ -273,7 +375,7 @@
static long retu_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct retu_tahvo_write_parms par;
- int ret;
+ int ret, result;
switch (cmd) {
case URT_IOCT_IRQ_SUBSCR:
@@ -290,7 +392,15 @@
printk(KERN_ERR "copy_to_user failed: %d\n", ret);
break;
case RETU_IOCH_ADC_READ:
- return retu_read_adc(arg);
+ result = retu_read_adc(arg);
+ if (result >= 0) {
+ dprintk("{READ-ADC %s} chan 0x%02lX ==> result 0x%04X\n",
+ adc_chan_name(arg), arg, result);
+ } else {
+ dprintk("{READ-ADC %s} chan 0x%02lX ==> failed %d\n",
+ adc_chan_name(arg), arg, result);
+ }
+ return result;
default:
return -ENOIOCTLCMD;
}
@@ -332,6 +442,8 @@
list_move(&irq->node, &retu_irqs_reserve);
spin_unlock_irqrestore(&retu_irqs_lock, flags);
+ dprintk("{IRQ %s} %d delivered\n", retu_irq_name(irq_id), (int)irq_id);
+
ret = copy_to_user(buf + i * sizeof(irq_id), &irq_id,
sizeof(irq_id));
if (ret)
Index: linux-2.6.37/drivers/cbus/tahvo-user.c
===================================================================
--- linux-2.6.37.orig/drivers/cbus/tahvo-user.c 2011-02-05 20:01:30.638705501 +0100
+++ linux-2.6.37/drivers/cbus/tahvo-user.c 2011-02-05 20:57:03.817249794 +0100
@@ -46,6 +46,12 @@
#define PFX "tahvo-user: "
+#ifdef CONFIG_CBUS_TAHVO_USER_DEBUG
+# define dprintk(fmt, x...) printk(KERN_DEBUG PFX fmt, x)
+#else
+# define dprintk(fmt, x...) do { } while (0)
+#endif
+
/* Bitmap for marking the interrupt sources as having the handlers */
static u32 tahvo_irq_bits;
@@ -87,6 +93,60 @@
1
};
+#ifdef CONFIG_CBUS_TAHVO_USER_DEBUG
+static const char * reg_access_text(unsigned int reg)
+{
+ if (WARN_ON(reg >= ARRAY_SIZE(tahvo_access_bits)))
+ return "X";
+ switch (tahvo_access_bits[reg]) {
+ case READ_ONLY:
+ return "R";
+ case WRITE_ONLY:
+ return "W";
+ case READ_WRITE:
+ return "RW";
+ case TOGGLE:
+ return "T";
+ }
+ return "X";
+}
+
+static const char * reg_name(unsigned int reg)
+{
+ static const char *names[] = {
+ [TAHVO_REG_ASICR] = "ASIC ID & revision",
+ [TAHVO_REG_IDR] = "Interrupt ID",
+ [TAHVO_REG_IDSR] = "Interrupt status",
+ [TAHVO_REG_IMR] = "Interrupt mask",
+ [TAHVO_REG_LEDPWMR] = "LED PWM",
+ [TAHVO_REG_USBR] = "USB control",
+ };
+ const char *name;
+
+ if (reg >= ARRAY_SIZE(names))
+ return "";
+ name = names[reg];
+ if (!name)
+ return "";
+ return name;
+}
+
+static const char * tahvo_irq_name(unsigned int id)
+{
+ static const char *names[] = {
+ [TAHVO_INT_VBUSON] = "VBUSON",
+ };
+ const char *name;
+
+ if (id >= ARRAY_SIZE(names))
+ return "";
+ name = names[id];
+ if (!name)
+ return "";
+ return name;
+}
+#endif
+
/*
* The handler for all TAHVO interrupts.
*
@@ -142,6 +202,8 @@
/* Mark that this interrupt has a handler */
tahvo_irq_bits |= 1 << id;
+ dprintk("Subscribed to IRQ %d (%s)\n", id, tahvo_irq_name(id));
+
return 0;
}
@@ -200,6 +262,10 @@
}
/* Generate a new value */
tmp = (tmp & ~MASK(field)) | (value & MASK(field));
+
+ dprintk("{WRITE %s} 0x%02X(%s) <= msk 0x%04X, val 0x%04X ==> res 0x%04X\n",
+ reg_name(reg), reg, reg_access_text(reg), MASK(field), value, tmp);
+
/* Write data to TAHVO */
tahvo_write_reg(reg, tmp);
spin_unlock_irqrestore(&tahvo_lock, flags);
@@ -228,6 +294,9 @@
/* Read the register */
value = tahvo_read_reg(reg) & mask;
+ dprintk("{READ %s} 0x%02X(%s) <= msk 0x%04X ==> res 0x%04X\n",
+ reg_name(reg), reg, reg_access_text(reg), mask, value);
+
/* Right justify value */
while (!(mask & 1)) {
value = value >> 1;
@@ -314,6 +383,8 @@
list_move(&irq->node, &tahvo_irqs_reserve);
spin_unlock_irqrestore(&tahvo_irqs_lock, flags);
+ dprintk("{IRQ %s} %d delivered\n", tahvo_irq_name(irq_id), (int)irq_id);
+
ret = copy_to_user(buf + i * sizeof(irq_id), &irq_id,
sizeof(irq_id));
if (ret)
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